MTU and ping size confusion

I am very glade to return back after pausing posting for a while. Actually we were very busy the last few months evaluating, designing and preparing for our company’s backbone migration, a little C Vs J with all its fun 😉 Anyway, while going through the low level design we faced a little confusion when evaluating the MTU issues with MPLS running over. In the past we used to conduct the tests with Cisco’s IOS extended ping, but now we have IOS XR and JUNOS in addition, and we were hit by the fact of the difference in behavior. Digesting …

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How to select your core routers?

This question comes to my mind every time we are faced by choosing a new device for our network or whenever I read about hardware architecture of networking devices. However, when the time comes for  choosing routers for a large network migration I thought it will be wise to have a checklist or a model for comparing and evaluating the different options. I came out with the following list to start with, read it and let me know us your ideas. My Core routers evaluation checklist: Packet forwarding capacity: The main function of routers in the core network is to …

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CRS-1 Hardware Overview

After introducing the Cisco  CRS-1 router in a previous post, We are going to delve more into the hardware architecture of this router. I believe we have to start by defining the main hardware components of the CRS-1 router and briefly describe their functions. In later posts we are going to study each part in more details. Now lets continue our baby steps. Note: I will be focusing on single chassis configurations.

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Simple Ideas Create Great Realities

“Imagine a world in which every single person on the planet has free access to the sum of all human knowledge.” Jimmy Wales. All the great achievements in human history began as a simple idea in someone’s head. The above statment is no different. The above statement was nothing but the vision of Jimmy Wales the founder of wikipedia. Over many years hundreds of volunteers have transformed this man’s vision into reality. Over the past eight years wikipedia has been there for you and for everyone of us. Today wikipedia needs you to operate, grow and to spread the benefits …

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Carrier Routing System (CRS-1) Overview

We have finished the physical installation of our CRS-1 routers this week, so I thought it would be nice to have some discussions about CRS-1, Juniper T-series and some general high end platform concepts. I believe this will be a series of posts, we can start with the CRS-1 overview. The CRS-1 is a carrier class router as its name implies, it comes in 4, 8  and 16 slots chassis. The system can be configured as a single or multi-shelf system (Currently only 16 slots supports multi-shelf configuration).

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BGP table analysis and statistics

For those of you who are interested in obtaining some useful information about the BGP table (Internet routing table), check out the following websites for some useful reports, analysis and statistics. Nice resources for daily work, research and planning. Play around: BGP Routing Table Analysis Reports. Check bgp4.as also for  a ton of tools and information about the BGP table.

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